American Occupational Therapy Association

Skip to Main Content

Table 2.

Developmental Measures for Participants Completing the Bone Density Study

Variable	Prepod Group (n = 10)^a		Control Group (n = 11)^b
Variable	M	Range	M	Range
Age
Birth age	29 wk, 6 days	28 wk, 4 days–31 wk, 4 days	29 wk, 6 days	28 wk, 2 days–31 wk, 4 days
Initial UTS age	32 wk, 2 days	30 wk, 5 days–32 wk, 5 days	32 wk, 3 days	31 wk, 2 days–32 wk, 5 days
Exit UTS age	36 wk, 1 day	34 wk, 4 days–37 wk, 1 day	36 wk, 2 days	35 wk, 2 days–36 wk, 5 days
SOS, m/s
Initial SOS	2,911	2,705–3,032	2,918	2,756–3,045
Exit SOS	2,848	2,755–2,934	2,803	2,653–2,973
SD	95.48		79.99
t	−3.5
df	10
p	.27
Weight gain, g
Birth weight	1,426	1,145–1,825	1,472	1,080–1,975
Discharge weight	2,556	2,085–3,255	2,811	2,481–3,295
Gain (range)	1,132 (567–1,770)		1,339 (826–1,780)
Daily growth	26.28		25.26
SD	372		273
t	−1.40
df	10
p	.09
Head circumference, cm
At birth	27.9	24.5–31.8	28.9	25.0–31.5
At discharge	32.2	30.5–35.5	33.4	31.5–35.5
Growth per day (range)	0.10 (0.20–6.50)		0.10 (2.00–8.80)
SD	2.03		2.02
t	−1.43
df	10
p	.09

Variable	Prepod Group (n = 10)^a		Control Group (n = 11)^b
Variable	M	Range	M	Range
Age
Birth age	29 wk, 6 days	28 wk, 4 days–31 wk, 4 days	29 wk, 6 days	28 wk, 2 days–31 wk, 4 days
Initial UTS age	32 wk, 2 days	30 wk, 5 days–32 wk, 5 days	32 wk, 3 days	31 wk, 2 days–32 wk, 5 days
Exit UTS age	36 wk, 1 day	34 wk, 4 days–37 wk, 1 day	36 wk, 2 days	35 wk, 2 days–36 wk, 5 days
SOS, m/s
Initial SOS	2,911	2,705–3,032	2,918	2,756–3,045
Exit SOS	2,848	2,755–2,934	2,803	2,653–2,973
SD	95.48		79.99
t	−3.5
df	10
p	.27
Weight gain, g
Birth weight	1,426	1,145–1,825	1,472	1,080–1,975
Discharge weight	2,556	2,085–3,255	2,811	2,481–3,295
Gain (range)	1,132 (567–1,770)		1,339 (826–1,780)
Daily growth	26.28		25.26
SD	372		273
t	−1.40
df	10
p	.09
Head circumference, cm
At birth	27.9	24.5–31.8	28.9	25.0–31.5
At discharge	32.2	30.5–35.5	33.4	31.5–35.5
Growth per day (range)	0.10 (0.20–6.50)		0.10 (2.00–8.80)
SD	2.03		2.02
t	−1.43
df	10
p	.09

Note. SOS = speed of sound; UTS = ultrasound.

^a

The prepod group was composed of 5 male infants and 5 female infants.

^b

The control group was composed of 7 male infants and 4 female infants.